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<FONT color="green">001</FONT>    package org.hackystat.sensorshell;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import java.io.File;<a name="line.3"></a>
<FONT color="green">004</FONT>    import java.io.FileInputStream;<a name="line.4"></a>
<FONT color="green">005</FONT>    import java.io.FileOutputStream;<a name="line.5"></a>
<FONT color="green">006</FONT>    import java.text.SimpleDateFormat;<a name="line.6"></a>
<FONT color="green">007</FONT>    import java.util.Date;<a name="line.7"></a>
<FONT color="green">008</FONT>    import java.util.Locale;<a name="line.8"></a>
<FONT color="green">009</FONT>    import javax.xml.bind.JAXBContext;<a name="line.9"></a>
<FONT color="green">010</FONT>    import javax.xml.bind.Marshaller;<a name="line.10"></a>
<FONT color="green">011</FONT>    import javax.xml.bind.Unmarshaller;<a name="line.11"></a>
<FONT color="green">012</FONT>    import org.hackystat.sensorbase.resource.sensordata.jaxb.SensorData;<a name="line.12"></a>
<FONT color="green">013</FONT>    import org.hackystat.sensorbase.resource.sensordata.jaxb.SensorDatas;<a name="line.13"></a>
<FONT color="green">014</FONT>    <a name="line.14"></a>
<FONT color="green">015</FONT>    /**<a name="line.15"></a>
<FONT color="green">016</FONT>     * Provides a facility for persisting buffered SensorData instances locally when the SensorBase<a name="line.16"></a>
<FONT color="green">017</FONT>     * host is not available and then sending them during a subsequent invocation of SensorShell.<a name="line.17"></a>
<FONT color="green">018</FONT>     * <a name="line.18"></a>
<FONT color="green">019</FONT>     * @author Philip Johnson<a name="line.19"></a>
<FONT color="green">020</FONT>     */<a name="line.20"></a>
<FONT color="green">021</FONT>    public class OfflineManager {<a name="line.21"></a>
<FONT color="green">022</FONT>      <a name="line.22"></a>
<FONT color="green">023</FONT>      /** The directory where offline data is stored. */<a name="line.23"></a>
<FONT color="green">024</FONT>      private File offlineDir;<a name="line.24"></a>
<FONT color="green">025</FONT>      <a name="line.25"></a>
<FONT color="green">026</FONT>      /** The SensorShell associated with this OfflineManager. */<a name="line.26"></a>
<FONT color="green">027</FONT>      private SensorShell shell;<a name="line.27"></a>
<FONT color="green">028</FONT>      <a name="line.28"></a>
<FONT color="green">029</FONT>      private JAXBContext jaxbContext;<a name="line.29"></a>
<FONT color="green">030</FONT>      <a name="line.30"></a>
<FONT color="green">031</FONT>      /**<a name="line.31"></a>
<FONT color="green">032</FONT>       * Constructor for OfflineManager which initializes the location for offline data.<a name="line.32"></a>
<FONT color="green">033</FONT>       * @param shell The SensorShell associated with this OfflineManager.<a name="line.33"></a>
<FONT color="green">034</FONT>       */<a name="line.34"></a>
<FONT color="green">035</FONT>      public OfflineManager(SensorShell shell) {<a name="line.35"></a>
<FONT color="green">036</FONT>        this.offlineDir = new File(System.getProperty("user.home") + "/.hackystat/offline/");<a name="line.36"></a>
<FONT color="green">037</FONT>        this.offlineDir.mkdirs();<a name="line.37"></a>
<FONT color="green">038</FONT>        this.shell = shell;<a name="line.38"></a>
<FONT color="green">039</FONT>        try {<a name="line.39"></a>
<FONT color="green">040</FONT>          this.jaxbContext = <a name="line.40"></a>
<FONT color="green">041</FONT>            JAXBContext.newInstance("org.hackystat.sensorbase.resource.sensordata.jaxb");<a name="line.41"></a>
<FONT color="green">042</FONT>        }<a name="line.42"></a>
<FONT color="green">043</FONT>        catch (Exception e) {<a name="line.43"></a>
<FONT color="green">044</FONT>          throw new RuntimeException("Could not create JAXB context.");<a name="line.44"></a>
<FONT color="green">045</FONT>        }<a name="line.45"></a>
<FONT color="green">046</FONT>      }<a name="line.46"></a>
<FONT color="green">047</FONT>      <a name="line.47"></a>
<FONT color="green">048</FONT>      /**<a name="line.48"></a>
<FONT color="green">049</FONT>       * Stores a SensorDatas instance to a serialized file in the offline directory.<a name="line.49"></a>
<FONT color="green">050</FONT>       * @param sensorDatas The SensorDatas instance to be stored. <a name="line.50"></a>
<FONT color="green">051</FONT>       */<a name="line.51"></a>
<FONT color="green">052</FONT>      public void store(SensorDatas sensorDatas) {<a name="line.52"></a>
<FONT color="green">053</FONT>        SimpleDateFormat fileTimestampFormat = <a name="line.53"></a>
<FONT color="green">054</FONT>          new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss.SSS", Locale.US);<a name="line.54"></a>
<FONT color="green">055</FONT>        String fileStampString = fileTimestampFormat.format(new Date());<a name="line.55"></a>
<FONT color="green">056</FONT>        File outFile = new File(this.offlineDir, fileStampString + ".xml");<a name="line.56"></a>
<FONT color="green">057</FONT>        try {<a name="line.57"></a>
<FONT color="green">058</FONT>          Marshaller marshaller = jaxbContext.createMarshaller();<a name="line.58"></a>
<FONT color="green">059</FONT>          marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);<a name="line.59"></a>
<FONT color="green">060</FONT>          marshaller.marshal(sensorDatas, new FileOutputStream(outFile));<a name="line.60"></a>
<FONT color="green">061</FONT>          }<a name="line.61"></a>
<FONT color="green">062</FONT>        catch (Exception e) {<a name="line.62"></a>
<FONT color="green">063</FONT>          shell.println("Error writing the offline file " + outFile.getName() + " " + e);<a name="line.63"></a>
<FONT color="green">064</FONT>        }<a name="line.64"></a>
<FONT color="green">065</FONT>        shell.println("Stored " + sensorDatas.getSensorData().size() + " sensor data instances in: " <a name="line.65"></a>
<FONT color="green">066</FONT>            + outFile.getAbsolutePath());<a name="line.66"></a>
<FONT color="green">067</FONT>      }<a name="line.67"></a>
<FONT color="green">068</FONT>      <a name="line.68"></a>
<FONT color="green">069</FONT>      /**<a name="line.69"></a>
<FONT color="green">070</FONT>       * Recovers any previously stored SensorDatas instances from their serialized files.<a name="line.70"></a>
<FONT color="green">071</FONT>       * Each SensorDatas instance is deserialized, then each SensorData instance inside is<a name="line.71"></a>
<FONT color="green">072</FONT>       * individually sent to the SensorShell.  This gives the SensorShell an opportunity to <a name="line.72"></a>
<FONT color="green">073</FONT>       * send batches off at whatever interval it chooses.<a name="line.73"></a>
<FONT color="green">074</FONT>       * All serialized files are deleted after being processed, regardless of whether or not<a name="line.74"></a>
<FONT color="green">075</FONT>       * processing is successful or not. <a name="line.75"></a>
<FONT color="green">076</FONT>       */<a name="line.76"></a>
<FONT color="green">077</FONT>      public void recover() {<a name="line.77"></a>
<FONT color="green">078</FONT>        File[] xmlFiles = this.offlineDir.listFiles(new ExtensionFileFilter(".xml"));<a name="line.78"></a>
<FONT color="green">079</FONT>        FileInputStream fileStream = null;<a name="line.79"></a>
<FONT color="green">080</FONT>        for (int i = 0; i &lt; xmlFiles.length; i++) {<a name="line.80"></a>
<FONT color="green">081</FONT>          try {<a name="line.81"></a>
<FONT color="green">082</FONT>            // Reconstruct the SensorDatas instances from the serialized files. <a name="line.82"></a>
<FONT color="green">083</FONT>            this.shell.println("Recovering offline data from: " + xmlFiles[i].getName());<a name="line.83"></a>
<FONT color="green">084</FONT>            fileStream = new FileInputStream(xmlFiles[i]);<a name="line.84"></a>
<FONT color="green">085</FONT>            Unmarshaller unmarshaller = this.jaxbContext.createUnmarshaller();<a name="line.85"></a>
<FONT color="green">086</FONT>            SensorDatas sensorDatas = (SensorDatas)unmarshaller.unmarshal(fileStream);<a name="line.86"></a>
<FONT color="green">087</FONT>            for (SensorData data : sensorDatas.getSensorData()) {<a name="line.87"></a>
<FONT color="green">088</FONT>              this.shell.add(data);<a name="line.88"></a>
<FONT color="green">089</FONT>            }<a name="line.89"></a>
<FONT color="green">090</FONT>            fileStream.close();<a name="line.90"></a>
<FONT color="green">091</FONT>          }<a name="line.91"></a>
<FONT color="green">092</FONT>          catch (Exception e) {<a name="line.92"></a>
<FONT color="green">093</FONT>            this.shell.println("Error recovering offline data from: " + xmlFiles[i] + " " + e);<a name="line.93"></a>
<FONT color="green">094</FONT>            try {<a name="line.94"></a>
<FONT color="green">095</FONT>              fileStream.close();<a name="line.95"></a>
<FONT color="green">096</FONT>            }<a name="line.96"></a>
<FONT color="green">097</FONT>            catch (Exception f) { //NOPMD<a name="line.97"></a>
<FONT color="green">098</FONT>              // do nothing<a name="line.98"></a>
<FONT color="green">099</FONT>            }<a name="line.99"></a>
<FONT color="green">100</FONT>          }<a name="line.100"></a>
<FONT color="green">101</FONT>          // Delete the serialized file, regardless of whether it was restored correctly or not.<a name="line.101"></a>
<FONT color="green">102</FONT>          xmlFiles[i].delete();<a name="line.102"></a>
<FONT color="green">103</FONT>        }   <a name="line.103"></a>
<FONT color="green">104</FONT>      }<a name="line.104"></a>
<FONT color="green">105</FONT>    }<a name="line.105"></a>




























































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